The _______ framework in Go allows you to write behavior-driven tests using a natural language style.
- Ginkgo
- Gobot
- Gomega
- Goprof
Ginkgo is a popular testing framework in Go that facilitates writing behavior-driven tests using a natural language style. It provides expressive syntax for test cases, making them more readable and maintainable.
Anonymous functions in Go can capture variables from the surrounding scope. What is this concept called?
- Function Overloading
- Lexical Scoping
- Namespace Isolation
- Variable Encapsulation
In Go, anonymous functions have access to variables in the lexical scope where they are defined. This means they can capture and use variables from the surrounding scope, which is referred to as lexical scoping. Lexical scoping enables powerful and flexible programming constructs in Go.
The _______ method in mocking allows defining the behavior of a mock object.
- Expect
- MockFunc
- OnCall
- Return
In mocking frameworks, the Return method allows developers to define the behavior of a mock object. This method is used to specify the value that should be returned when a mocked function or method is called during testing. It enables developers to set up the expected behavior of the mock object for different test scenarios.
In MongoDB, what does BSON stand for?
- Binary Serialized Object Notation
- Binary Serialized Object Notation
- Binary Serialized Object Notation
- Binary Syntax Object
BSON stands for Binary Serialized Object Notation. It is a binary-encoded serialization of JSON-like documents used in MongoDB to represent complex data structures and to support data storage and interchange.
In Go, which package is used to interact with SQL databases?
- database/sql
- golang-sql
- gosql
- sql
In Go, the package used to interact with SQL databases is database/sql. It provides a powerful and flexible API for executing SQL queries, working with result sets, and managing database connections, making it essential for database access.
In a performance-critical section of your code, you need to efficiently swap the values of two variables. Which operator could you use to achieve this in Go?
- a ^= b ^= a ^= b
- a, b = b, a
- swap(a, b)
- temp := a; a = b; b = temp
Go supports multiple assignment, enabling swapping of variables using a, b = b, a. This approach is concise and efficient, ideal for performance-critical sections.
Suppose you're building a system where you need to represent and manipulate raw binary data. Which data type would be most appropriate for this task?
- binary
- bit
- byte (uint8)
- uint16
The byte (uint8) data type is most appropriate for representing raw binary data in Go. It has a size of 8 bits, making it suitable for storing individual bytes of binary data and manipulating them effectively.
What keyword is used to specify a condition in a switch statement in Go?
- case
- condition
- if
- select
The case keyword is used to specify a condition in a switch statement in Go. It helps in defining different cases and their corresponding actions within the switch statement.
You have multiple goroutines reading from a single channel in Go. How would you ensure that each goroutine receives the data only once?
- Use a buffered channel
- Use a sync.Mutex
- Use a sync.Once
- Use a sync.WaitGroup
In this scenario, utilizing a sync.Mutex ensures that each goroutine receives the data only once by synchronizing access to a shared resource, preventing concurrent access.
To omit a field during JSON encoding in Go, you can use the ________ tag with a dash ("-").
- Exclude
- NoEncode
- Omit
- Skip
In Go, to omit a field during JSON encoding, you can use the json:"-" tag. This tag instructs the encoding/json package to skip the field during the encoding process. It's useful when you want to exclude certain fields from the JSON output, such as sensitive information or fields that should not be shared externally. By tagging a field with -, you ensure it's not included in the JSON output, providing more control over what data gets exposed.